Search found 2731 matches

by haklesup
Mon Apr 15, 2019 3:05 pm
Forum: General Discussion
Topic: What kind of dye is this?
Replies: 5
Views: 131

Re: What kind of dye is this?

probably the same dye used in crayons and candles of it is a real Wax. What the dye is, depends on the color. If you are using a polymer wax, its probably a little different https://www.crayola.com/faq/science/can-you-provide-information-about-crayons-for-a-science-fair-project/ https://makezine.com...
by haklesup
Thu Apr 11, 2019 11:25 am
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 85
Views: 3925

Re: Odd Commercial Products.........

Peltier would only cause you to need to remove more heat and need to generate more power. They are horribly inefficient generating ~ 4x to 6x more heat on the hot side than they remove on the cool side due to the high current they require to operate. If you really need to get something below ambient...
by haklesup
Tue Apr 09, 2019 12:40 pm
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 85
Views: 3925

Re: Odd Commercial Products.........

you're a day late for an April fools joke on the DVD rewinder :) The gas flashlight might be a thing for the super bright flashlight hacking crowd, looks like it has a fair share of yellow electrical tape on it. Just need some water cooling for the LEDs and you're are on the way to hella lumens http...
by haklesup
Tue Apr 09, 2019 12:32 pm
Forum: General Discussion
Topic: Soldering iron tip woes
Replies: 11
Views: 216

Re: Soldering iron tip woes

A solid copper tip can be just filed or sanded but cheap tips may be other alloys with a plating on top to make it wet the solder. A super cheap tip can burn off (or erode) this plating in no time and become impossible to restore. Stick with the brand names and don't bank on an ebay deal. If that's ...
by haklesup
Thu Apr 04, 2019 12:42 pm
Forum: General Discussion
Topic: Diode forward/reverse resistance measurement
Replies: 8
Views: 1536

Re: Diode forward/reverse resistance measurement

Ya, its old. Component testers produce a curve that resembles a curve tracer but is generally uncalibrated and had less control over settings. They also use a faster scan rate 50 or 200 hz in this case which produces the looping effect caused by inductors and capacitors. A curve tracer for character...
by haklesup
Fri Mar 29, 2019 11:26 am
Forum: General Discussion
Topic: Soldering Fat
Replies: 3
Views: 162

Re: Soldering Fat

probably noting but a regional translation quirk, I could not find any examples of the packaging printed in english
by haklesup
Tue Mar 26, 2019 3:12 pm
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 85
Views: 3925

Re: Odd Commercial Products.........

"Now another Toaster related product for you lazy people...…"

too lazy to clean melted cheese out of the toaster that is. :razz:

What I have not seen is a slot toaster mated to a toaster oven
by haklesup
Tue Mar 12, 2019 12:43 pm
Forum: General Discussion
Topic: Antenna Cable Routing.........
Replies: 9
Views: 314

Re: Antenna Cable Routing.........

While the wall wart had a stable no load voltage, it pulses when plugged into the device, its trash now. Seems it operated in a sort of half wave mode for a while until something else failed. Easy enough to replace except the connector is normally used for 12V DC so I'll need to splice it to a USB c...
by haklesup
Tue Mar 12, 2019 12:38 pm
Forum: General Discussion
Topic: Any integrated circuit that works as the old tone decoder but for RF ?
Replies: 7
Views: 180

Re: Any integrated circuit that works as the old tone decoder but for RF ?

Modern Bugs and WiFi hover near 2.4Mhz so its something else or older tech. maybe you can find a used Spectrum analyzer in an affordable range. here is an interesting Cell phone spectrum analyzer hack and product https://www.youtube.com/watch?v=zu-K1Sslw1Q https://www.youtube.com/watch?v=5LC7YYA6s4A
by haklesup
Mon Mar 11, 2019 3:07 pm
Forum: General Discussion
Topic: Any integrated circuit that works as the old tone decoder but for RF ?
Replies: 7
Views: 180

Re: Any integrated circuit that works as the old tone decoder but for RF ?

I don't think so, most RF signals have digitally encoded data that do the work (or at least AM or FM modulation in an old system). Getting an FCC license to use a bunch of broadcast frequencies in an interference scheme seems unlikely. If you just want to detect either of these frequencies, then a r...
by haklesup
Mon Mar 11, 2019 11:36 am
Forum: General Discussion
Topic: Antenna Cable Routing.........
Replies: 9
Views: 314

Re: Antenna Cable Routing.........

Earlier in this thread I complained about a cheap wall wart. When I opened it up, I found one of the 4 input rectified diodes with one leg not ever soldered to the board. it didn't fall out, it was far from the hole and clean. I'm shocked that it actually worked for several months like that
by haklesup
Fri Mar 08, 2019 2:09 pm
Forum: General Discussion
Topic: Energy problem solved!
Replies: 4
Views: 176

Re: Energy problem solved!

Just a power factor corrector and not a very big one either. That youtube video was very good at explaining this product and its shortcomings Seems to be an incidence of taking real engineering theory and misapplying it to a situation to make money. Most inductive appliances already have PF correcti...
by haklesup
Fri Mar 08, 2019 1:55 pm
Forum: General Discussion
Topic: Antenna Cable Routing.........
Replies: 9
Views: 314

Re: Antenna Cable Routing.........

My experience with RF antenna Splitters is that you can split 3 maybe 4 times at most and then the signal gets too low to be reliable. I recommend a powered amplified splitter if you do it that way but not for any cable that may go to a router. if that really is a 4 way switch then it appears you sp...
by haklesup
Thu Mar 07, 2019 11:35 am
Forum: General Discussion
Topic: Technology Backfire?
Replies: 31
Views: 706

Re: Technology Backfire?

I would think the series resistance of a fuse is too low to use as a series resistor. Wouldn't you be looking at uV at the most a few mV differentials. I can't say I've tried because I am biased by that opinion. I'm inspired to get the meter in my first post's link for my explorer. I think the compo...
by haklesup
Wed Mar 06, 2019 4:25 pm
Forum: General Discussion
Topic: Technology Backfire?
Replies: 31
Views: 706

Re: Technology Backfire?

Even before you start pulling fuses you will want to figure out how many standby states the car has by observing the total standby current over a period of time with and without the key fob nearby perhaps jiggling the car to stimulate an oversensitive position sensor, opening various doors, unlocked...